Desertification

The transcript discusses how natural processes can be accelerated by human activities like overgrazing and water diversion. It highlights the 1930s Dust Bowl in the USA, where poor farming methods and drought led to the rapid destruction of over 40 million hectares of farmland.

Which human activities can speed up natural processes?

• Overgrazing and diverting water flows

• Using renewable energy

• Planting more trees

• Reducing carbon emissions

In which decade did the Dust Bowl occur in the USA?

• 1930s

• 1920s

• 1950s

• 1940s

What combination of factors led to the Dust Bowl?

• Industrial pollution and deforestation

• Farming methods and a drought

• Urbanization and climate change

• Overfishing and water pollution

How many hectares of farmland were destroyed during the Dust Bowl?

• 10 million

• 20 million

• 30 million

• Over 40 million

What was the immediate impact of the Dust Bowl on farmland?

• Destruction almost overnight

• Gradual decline over years

• Increase in crop yield

• Improvement in soil quality